Animals that use a radula to scrape up algae are _____
a. gastropods
b. bivalves
c. annelids
d. roundworms
e. leeches
ANSWER: a
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True or False: A biological clock is a set of molecular mechanisms that cycles on its own and thus keeps a regular rhythm
A. true B. false
____ is NOT a condition of the Hardy-Weinberg concept.
A. Random mating B. Lack of mutations C. Small population size D. Lack of migration
Fungi and insects both use the nitrogenous polysaccharide (cellulose/chitin/silica) as a protective molecule in their outer surfaces
What will be an ideal response?
Cultures taken from an impetigo lesion reveal bacteria that are Gram-positive cocci which are catalase- and coagulase-negative and cause beta-hemolysis when cultured on blood agar. The responsible species is
A) Staphylococcus aureus. B) staphylococci species other than Staphylococcus aureus. C) Streptococcus pyogenes. D) Pseudomonas aeruginosa. E) Clostridium perfringens.